3Accuracy and Precision You must use the correct equipmentAccuracy is how close you come to the desired valuePrecision is how close all of the data is to itself
4Significant Figures The amount of rounding that is acceptable Calculators do not use significant figuresSig Figs are essential to reporting the resultsThis discusses how certain one is of each number
5Significant Figures Rules 1. ALL non-zero numbers are significant 2. All zeros between non-zero numbers are significant3. Zeros to the right of a non-zero number are significant ONLY if a decimal is used4. Zeros to the left of non-zero numbers are not significant
6Significant Figures46.3All three numbers are significant40.789All five numbers are significant7.890All four numbers are significantAll six numbers are significantFour numbers are significant
7Significant Figures Multiplication and Division The answer must have the same number of significant figures as the measurement with the SMALLEST number of significant figuresx =On the calculator it reads:The measurement with the smallest number of sig figs is with four sig figs, so round so the answer has four sig figs, or 14.24
8Significant Figures Addition and subtraction The answer can be no more certain than the least certain number in the calculation
9Scientific NotationThis shows significant figures by condensing to a single digit decimal place486,000,000,000 becomes 4.86 x 1011becomes 6.8 x 10-14Must have single digit decimal placeWhen the exponent is positive, the number is greater than 1When the exponent is negative, the number is less than 1
10Scientific NotationWhen putting scientific notation in the calculator, use the EE or EXP button, do not put x 10 ^ exponentIf this is done, the calculation will be incorrect!